Teat-cup for milking-machines



B. A. KNOWLES.

TEAT CUP FOR MlLKING MACHINES.

APPLICATION FILED NOV. 16,3916.

1,333,26 1 Patented Mar. 9, 1920.

5627mm /l. Know deg 33,13 W W wwmw v milking machines,

lisel f has ing ofa portion of the cup,

xinomnns, or AZALIA, MICHIGAN. I

Be it known that I, BERNARD AIKNOWLES, a citizen of the: United "S'tateslofffimerica, residing atxAzalia, in the county' of Monroe andfState of Michigan, have; invented cer tain new and useful Improvements iniTreat r Cups for Milking-Machines, of which'the" following is a specification, reference being had therein to the accompanying'drawings.

This invention relates to teat cups for and refers" more particularly to anew and improved construction adapted for use in milking machines of the intermittent or pulsating type.

It is one of, the objects of the invention .to provide a construction of -th'e character the teat cup it-- a longitudinally reciprocating movement; to so construct and arrange the above referred to in which parts that upon the suction or vacuumstroke the outside air pressure will causea collapsthus drawing the'lower end of the teat cup upward; to provide resilient means for returning the teat cup to its original orexpanded position ,-up0n release of the vacuum pull; to pro VldB means for permitting the ingress of air from the lower portion of the cup to the inside of the collapsibleportion, upon release of the vacuum pull; and in general to provide a new. and improved construction of thecharacter above referred to.

, Theinvention further resides in such fea:

turesfof construction as will more fully hereinafter appear. Y

In the drawings:

Figure 1' is va side elevation partly in section showing the teat cupembodying my invention; Fig. 2 1s a cross sectlonon the 11118 of Fig. l. Heretof0re intermittent structions of teat cups have been used, such as those which are laterally collapsible and those. in which a flow of air oetween the cup in milking machines of the and the teat has been used for impartingthe v alternate suction and releasing movement.

The present invention contemplates a mate rially different construction in which the cup is so constructed and arranged that the main portion of the teat cup has a longitu-r dinalreciprocating movement.

Referring first in detail tothe construe};

; "mime? non iunxrne-menmns;

- specifloati onlof Letters-Patent;

a flange C to which formed on the lowerend of a collapsible air -more airpressure or nearly atmospheric 7 *When' the vacuum pull is produced upon wthe lower end of the cup A the chamber E E or pulsating type, various con-1' However,

the latter seeme Mar, 9.;,. 1920.

Application filed November. 16, 1916. Serial No. 13 1,666;

tion, designates a teat cup: which at its lower end i provided with-a nipple B for receiving the conduit that leads to the suction apparatus;

transparent material, although the invention inits broader aspects is notliin'ited to the use a transparent cup. 'At'itszuppcr end the main body portion A is' is secured a flange D chamber, comprising the relatively thick p i I lhis'mainj-body t n; A .isapmf rably formed: of celluloid other p p ovided with 7 walled upper portion E' formed preferably of stiff rubber and the lower portion E formed of flexible material which lower flexible portion, when the pressure vwithin the chamber E isreduced to less" than atmospheric, will collapse, thuscausing the main body portion 1 A to move upward;

When, however the suction 'is released and the chamber E E allowedto fill'with air theresiliency of said walls will force' the chamber back to its normal position, as shown in full llnes in Fig. 1, thusa reciproeating longitudinal movement of the cup 7 will'be produced. 7 f vFor allowing the ingress or egress of air from thechamber E E thelmain body sec- .tion A ispreferably provided with one or F which at their upper ends open into said chamber through an aperture G. The suction apparatus in milkchannels mg machines of this type is-arranged to al- .ternately exert a vacuum'pull of a predetermined amount and then to release this V pull and permit the return to atmospheric pressure.

7 it will also, through'the channel F, draw" outalr from reducing the pressure in the latter 'to less than atmospheric. The

pressure ofthe outside air will then force the walls of'the chamber E E and move the main body section A toward the upper edge H of said chamber. as soon as the suction is released on the lower end of the cup, air willfiow back into said chamber and the wall E of will spring to its original positlon. V l g 7 i t While I have, shown and described the I to collapse to "theposltion shown in dotted lines in Fig.1

conduit F as a grooved portion in the "wall"- v conduit or connection might-be employedof the main body section A, any suitable and various other changes in the'details of construction can be made Within the scope of my invention. 7 What-I clalm as my invention 1s:

1. In a milking machine, a teat cup 'com- 7 prising a main body portion, a collapsible air chamber adapted on the suction stroke to cause the main body portion to move lon- V gitudinally in one direction, and resilient means tending to return the collapsible portion to movethe main body portion in the opposite direction.

2. In a milkmg machine, a teat cup comprising a main body portion having a suc tion nipple at the lower end and a collapsible air chamber at its upper end, the inner face of the main body portion "being pro 2o Vided with a channel forming an air pasprising from the suction nipple to the air chamber.,

4; Ina milking machine, a teat cup comprising a main body portion, and a collapsible air chamber, said body portion being upwardly actuable through collapse of said air chamber and being downwardly actuable upon expansion thereof.

In testimony whereof I affix my signature.

Witnesses BYRON J. 001mm, MARY CLARK.

"BERNARD A. KNOWLES. I 

